In a triangle, Angle "A" is known, and the length of the two adjoining sides. How to find the length of the third side?
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Expert's answer
2012-05-17T09:19:04-0400
we can use cosine theorem so (length of the third side)^2= (length of the first side)^2+(length of the second side)^2-2*(length of the first side)*(length of the second side)*cos(A) length of the third side=sqrt[ (length of the first side)^2+(length of the second side)^2-2*(length of the first side)*(length of the second side)*cos(A) ]
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